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Discussion Starter · #1 ·
Hi Guys,

Well, I am at it again and am looking for something new to tinker with.

I love working on my RC's almost more, well actually, even more than I love driving them. So for this reason I want to find a bit of a challenge for my next project.

I was thinking a dual engine Savage, or something along those lines.

But please, If anyone has a good idea or a link to something worth buying, let mne know!!

Also, does anyone know where to order the new CEN Genesis from??

Cheers,
Shaun.
 

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camt order genesis yet!



If you have access to a machine shop and can fabricate the parts go a twin savage. Hell, i may even join you(fabricate 2 sets). I have designs drawn up for the engine mounts but it requires an extended chassis. Not sure i can afford to fabricate only 1 set.
 

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if i was you i wouldnt ge tthe genises..id go the savy twin engine.. would be alot more durable.. the genises doesnt have a reputation yet.. but it could be a bad one or a good one?? so would u risk it?? afterall your name is HIRISK
and are the any CEN dealer snere u?? so if u break a part u can get it??


but yeh go the savage twin .28 RB if u can afford it!!
u could be the first for twin rb .28??Edited by: X
 

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Revo is in fact around the same size as a T-Maxx, which even though is "classed" as a 1/10th, it is the same size as a Savage, therefore making it theoretically 1/8th scale.


Main reason its 1/10th is because of its .15 sized engine.
 

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Star Guitar said:
Revo is in fact around the same size as a T-Maxx, which even though is "classed" as a 1/10th, it is the same size as a Savage, therefore making it theoretically 1/8th scale.


Main reason its 1/10th is because of its .15 sized engine.




its a little smaller tha nthe savy.. but we will wait and se ehow durable it is.. atm the savage is the most durable truck out i think..but the revo looks to be the goods..
 

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can you really trust traxxas after the poor quality and not very durable t-maxx? Savage all the way
 

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I agree with u there Husky. I looked at the T-maxx before i even knew of those 2 majikal words: HPI SAVAGE. lookin at the t-boxx's i seen im OH SO GLAD I didnt get one! yeh bloody quick, but lots of breakin!!


Gotta luv how the savy can be held togetha by cable ties
......and still munch the boxx's in durability
. BUT THATS GETTIN OFF TOPIC....KINDA.


MY SUGGESTION


HEY HIRISK....... Why settle for 2 engines?? Am POSITIVE you would work out a way to fit FOUR(4) on there....??


Or How Bout a twin engine6or 8wheeler even??





theres a place in New st..(i think)in Newport in melbourne, they were doing a single engine 8 wheeler i think it was, i gotno infoon it but yeh.. it was a lhs so they should b in fone book neway.





Edited by: foolSp33d
 

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Discussion Starter · #10 ·
The thing is, I need to keep it pratical. I don't want to build something that looks crazy but just cant be run.

I think two engine on a truck is as far as I would want to go.
 

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Twin engines are so passe...



If you want a real challenge, did you know OS Engines has a Wankel rotary engine in their catalog? They've been making it for many many years for use in airplanes, yep its a glow engine - even uses a #8 plug. I have seen it installed into a SuperTen Kyosho before but not yet into a basher truck.





Or if that's too wanky, if you want to blow some serious cash how about one of their multi-cylinder radial engines??









Or christ... you could get it throbbing like a Suby FLAT FOUR...






(although if it ends up going "dak dak dak" like a VeeDub...
)
 

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Sir Zoomer, you have opened the dorr to a question I have wondered about for a few months now...


"Can you use an aircraft engine in a land based vehicle?"


Why is the primary difference? Is it the torque to spin the drive train as opposed to just truning a prop? I'm not winding anyone up, this is a serious question.


My suggestion for HIRISK


How about a 3rd channel operated self righting arm. Us bad savage drivers are getting sick of running down to put the thing back onto it's wheels after yet another crash. If this keeps up at the current rate I risk getting fit (OK not really likely... but at least bloody tired). I've seen mechanical arms used for lots of things and this may even get you a product you could sell.
 

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I always wanted to fit one of those wankels to a car, though someone
told me they didnt really suit a car that well for one reason or
another
would be cool though with an rx3/8 body shell on it


or the flat 4 with a wrx body
Can you get miniature turbos to fit to
them??


Along similar lines, saw in a magazine (cant remember what it was,
may have been Dirt & Track) they had an article on miniature motors
and they had tiny (working i believe) clevelands and ferrari motors
amongst others, looked just like the real thing, very cool!
 

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Skidd said:
How about a 3rd channel operated self righting arm. Us bad savage drivers are getting sick of running down to put the thing back onto it's wheels after yet another crash. If this keeps up at the current rate I risk getting fit (OK not really likely... but at least bloody tired). I've seen mechanical arms used for lots of things and this may even get you a product you could sell.




hmmmm.......



Im pretty sure you would have cooling issues with the air engines on land!
 

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Skidd said:
"Can you use an aircraft engine in a land based vehicle?"


Why is the primary difference? Is it the torque to spin the drive train as opposed to just turning a prop?

No difference... all nitro engines work the same!!


In the early days we used 3.5cc plane engines in cars. The required mods were to make it suit the flywheel/clutch and usually a larger heatsink. Plane engines had rotary carbs which gave good mid-range response, but then someone started making slidecarbs for better throttle response in a car etc etc.


Modern engines today might be more specialised for higher revs (more porting etc) and better metallurgy (plane engines are pretty unstressed)... but the latest engines still have the same 2 lugs on the side of the crankcase, do they not?
Leftover from the airplane-use ancestery!





Props aren't all the same btw... they come in different pitch (angle of the blades)as well as length/size. To spin a longer "aggressive pitch" one you need more torque too... eg a 4-stroke. More torque + high pitch prop gives you same thrust at half the revs.





Biggest challenge with fitting plane engine to a car is adapting a suitable clutch & flywheel assembly to fit. (In some cases need to chop the crankshaft -oooh,the mostnail-biting nervous job if there ever was!
)


Next job is locating the thing... Wankel & the Radials are made to mount onto the plane's firewall. Need some ingenuity to fix that to a car's flat chassis.


Also need to consider how you've going to start the thing.


Cooling used to be a problem as you lose the prop's airflow, but these days Kyosho sells crank-driven shrouded fans in many sizes that do the job well. Or just rig up an electric fan.








Current scratch-builders' challenge is building "small" nitro cars. Biggest problem there is that there aren't many tiny engines that are intake throttle-controlled, many are exhaust-throttled ie fixed inlet carburation.
 

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i think the bottom line is its somewhat impractical and un nessecary to bother with one of thise plane engines! twin RB 28's - much easier and practical. I couldn't see a plane engine holding up to the abuse it would cop on a MT!
 
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